1 /*
2 * Copyright (C) 2014 The Android Open Source Project
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in
12 * the documentation and/or other materials provided with the
13 * distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #ifndef _BIONIC_MBSTATE_H
30 #define _BIONIC_MBSTATE_H
31
32 #include <wchar.h>
33
34 __BEGIN_DECLS
35
36 /*
37 * These return values are specified by POSIX for multibyte conversion
38 * functions.
39 */
40 #define __MB_ERR_ILLEGAL_SEQUENCE static_cast<size_t>(-1)
41 #define __MB_ERR_INCOMPLETE_SEQUENCE static_cast<size_t>(-2)
42
43 #define __MB_IS_ERR(rv) (rv == __MB_ERR_ILLEGAL_SEQUENCE || \
44 rv == __MB_ERR_INCOMPLETE_SEQUENCE)
45
mbstate_bytes_so_far(const mbstate_t * ps)46 static inline __wur size_t mbstate_bytes_so_far(const mbstate_t* ps) {
47 return
48 (ps->__seq[2] != 0) ? 3 :
49 (ps->__seq[1] != 0) ? 2 :
50 (ps->__seq[0] != 0) ? 1 : 0;
51 }
52
mbstate_set_byte(mbstate_t * ps,int i,char byte)53 static inline void mbstate_set_byte(mbstate_t* ps, int i, char byte) {
54 ps->__seq[i] = static_cast<uint8_t>(byte);
55 }
56
mbstate_get_byte(const mbstate_t * ps,int n)57 static inline __wur uint8_t mbstate_get_byte(const mbstate_t* ps, int n) {
58 return ps->__seq[n];
59 }
60
mbstate_reset_and_return_illegal(int _errno,mbstate_t * ps)61 static inline __wur size_t mbstate_reset_and_return_illegal(int _errno, mbstate_t* ps) {
62 errno = _errno;
63 *(reinterpret_cast<uint32_t*>(ps->__seq)) = 0;
64 return __MB_ERR_ILLEGAL_SEQUENCE;
65 }
66
mbstate_reset_and_return(int _return,mbstate_t * ps)67 static inline __wur size_t mbstate_reset_and_return(int _return, mbstate_t* ps) {
68 *(reinterpret_cast<uint32_t*>(ps->__seq)) = 0;
69 return _return;
70 }
71
72 __END_DECLS
73
74 #endif // _BIONIC_MBSTATE_H
75